I am a Research Software Engineer at Delft University of Technology (TU Delft), where I currently help out in the Programming Languages Research Group on the Spoofax Language Workbench. I have a PhD in Computer Science from TU Delft, supervised by Eelco Visser. I have various research interests around language design and compiler technology. I’ve worked on declarative specification of data-flow analysis, practical incremental compilation for existing languages, and gradual types. I’ve designed FlowSpec, a domain-specific language for the specification of data-flow analysis. For incremental compilation I’ve taken apart the compiler of the Stratego term transformation language, and reassembled it as an incremental compiler. I’ve introduced a gradual type system to Stratego. FlowSpec and Stratego are part of the Spoofax Language Workbench.